sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

arch/risc-v: Refine syscall interface

Browse Source 
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
This commit is contained in:
Huang Qi 2021-12-29 23:49:31 +08:00 committed by Xiang Xiao
parent 438a62c4fc
commit 2de22980e5
10 changed files with 287 additions and 659 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

204
arch/risc-v/include/rv32im/syscall.h
View File

@ -1,204 +0,0 @@
/****************************************************************************
* arch/risc-v/include/rv32im/syscall.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/* This file should never be included directly but, rather, only indirectly
* through include/syscall.h or include/sys/sycall.h
*/
#ifndef __ARCH_RISCV_INCLUDE_RV32IM_SYSCALL_H
#define __ARCH_RISCV_INCLUDE_RV32IM_SYSCALL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define SYS_syscall 0x00
/* Configuration ************************************************************/
/* SYS call 1 and 2 are defined for internal use by the RISC-V port (see
* arch/riscv/include/mips32/syscall.h). In addition, SYS call 3 is the
* return from a SYS call in kernel mode. The first four syscall values
* must, therefore, be reserved (0 is not used).
*/
#ifdef CONFIG_BUILD_KERNEL
# ifndef CONFIG_SYS_RESERVED
# error "CONFIG_SYS_RESERVED must be defined to the value 4"
# elif CONFIG_SYS_RESERVED != 4
# error "CONFIG_SYS_RESERVED must have the value 4"
# endif
#endif
/* sys_call macros **********************************************************/
#ifndef __ASSEMBLY__
/* Context switching system calls *******************************************/
/* SYS call 0:
*
* int riscv_saveusercontext(uint32_t *saveregs);
*
* Return:
* 0: Normal Return
* 1: Context Switch Return
*/
#define SYS_save_context (0)
#define riscv_saveusercontext(saveregs) \
(int)sys_call1(SYS_save_context, (uintptr_t)saveregs)
/* SYS call 1:
*
* void riscv_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
*/
#define SYS_restore_context (1)
#define riscv_fullcontextrestore(restoreregs) \
sys_call1(SYS_restore_context, (uintptr_t)restoreregs)
/* SYS call 2:
*
* void riscv_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
*/
#define SYS_switch_context (2)
#define riscv_switchcontext(saveregs, restoreregs) \
sys_call2(SYS_switch_context, (uintptr_t)saveregs, (uintptr_t)restoreregs)
#ifdef CONFIG_BUILD_KERNEL
/* SYS call 3:
*
* void riscv_syscall_return(void);
*/
#define SYS_syscall_return (3)
#define riscv_syscall_return() (void)sys_call0(SYS_syscall_return)
#endif
#endif /* __ASSEMBLY__ */
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Inline functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: sys_call0
*
* Description:
* System call SYS_ argument and no additional parameters.
*
****************************************************************************/
uintptr_t sys_call0(unsigned int nbr);
/****************************************************************************
* Name: sys_call1
*
* Description:
* System call SYS_ argument and one additional parameter.
*
****************************************************************************/
uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1);
/****************************************************************************
* Name: sys_call2
*
* Description:
* System call SYS_ argument and two additional parameters.
*
****************************************************************************/
uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1, uintptr_t parm2);
/****************************************************************************
* Name: sys_call3
*
* Description:
* System call SYS_ argument and three additional parameters.
*
****************************************************************************/
uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3);
/****************************************************************************
* Name: sys_call4
*
* Description:
* System call SYS_ argument and four additional parameters.
*
****************************************************************************/
uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3, uintptr_t parm4);
/****************************************************************************
* Name: sys_call5
*
* Description:
* System call SYS_ argument and five additional parameters.
*
****************************************************************************/
uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3, uintptr_t parm4, uintptr_t parm5);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_RISCV_INCLUDE_RV32IM_SYSCALL_H */

349
arch/risc-v/include/rv64gc/syscall.h
View File

@ -1,349 +0,0 @@
/****************************************************************************
* arch/risc-v/include/rv64gc/syscall.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/* This file should never be included directly but, rather, only indirectly
* through include/syscall.h or include/sys/sycall.h
*/
#ifndef __ARCH_RISCV_INCLUDE_RV64GC_SYSCALL_H
#define __ARCH_RISCV_INCLUDE_RV64GC_SYSCALL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define SYS_syscall 0x00
/* The SYS_signal_handler_return is executed here... its value is not always
* available in this context and so is assumed to be 7.
*/
#ifndef SYS_signal_handler_return
# define SYS_signal_handler_return (7)
#elif SYS_signal_handler_return != 7
# error "SYS_signal_handler_return was assumed to be 7"
#endif
/* Configuration ************************************************************/
/* SYS call 1 and 2 are defined for internal use by the RISC-V port (see
* arch/risc-v/include/rv64gc/syscall.h). In addition, SYS call 3 is the
* return from a SYS call in kernel mode. The first four syscall values must,
* therefore, be reserved (0 is not used).
*/
#ifdef CONFIG_BUILD_KERNEL
# ifndef CONFIG_SYS_RESERVED
# error "CONFIG_SYS_RESERVED must be defined to the value 4"
# elif CONFIG_SYS_RESERVED != 4
# error "CONFIG_SYS_RESERVED must have the value 4"
# endif
#endif
/* sys_call macros **********************************************************/
#ifndef __ASSEMBLY__
/* Context switching system calls *******************************************/
/* SYS call 0:
*
* int riscv_saveusercontext(uint64_t *saveregs);
*
* Return:
* 0: Normal Return
* 1: Context Switch Return
*/
#define SYS_save_context (0)
#define riscv_saveusercontext(saveregs) \
(int)sys_call1(SYS_save_context, (uintptr_t)saveregs)
/* SYS call 1:
*
* void riscv_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
*/
#define SYS_restore_context (1)
#define riscv_fullcontextrestore(restoreregs) \
sys_call1(SYS_restore_context, (uintptr_t)restoreregs)
/* SYS call 2:
*
* void riscv_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
*/
#define SYS_switch_context (2)
#define riscv_switchcontext(saveregs, restoreregs) \
sys_call2(SYS_switch_context, (uintptr_t)saveregs, (uintptr_t)restoreregs)
#ifdef CONFIG_BUILD_KERNEL
/* SYS call 3:
*
* void riscv_syscall_return(void);
*/
#define SYS_syscall_return (3)
#define riscv_syscall_return() sys_call0(SYS_syscall_return)
#endif
#endif /* __ASSEMBLY__ */
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Inline functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: sys_call0
*
* Description:
* System call SYS_ argument and no additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call0(unsigned int nbr)
{
register long r0 asm("a0") = (long)(nbr);
asm volatile
(
"ecall"
:: "r"(r0)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call1
*
* Description:
* System call SYS_ argument and one additional parameter.
*
****************************************************************************/
static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call2
*
* Description:
* System call SYS_ argument and two additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call3
*
* Description:
* System call SYS_ argument and three additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call4
*
* Description:
* System call SYS_ argument and four additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call5
*
* Description:
* System call SYS_ argument and five additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call6
*
* Description:
* System call SYS_ argument and six additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5,
uintptr_t parm6)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
register long r6 asm("a6") = (long)(parm6);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5), "r"(r6)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_RISCV_INCLUDE_RV64GC_SYSCALL_H */

290
arch/risc-v/include/syscall.h
View File

@ -29,20 +29,93 @@
* Included Files
****************************************************************************/
/* Include RISC-V architecture-specific syscall macros */
#include <nuttx/config.h>
#ifdef CONFIG_ARCH_RV32
# include <arch/rv32im/syscall.h>
#endif
#ifdef CONFIG_ARCH_RV64
# include <arch/rv64gc/syscall.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define SYS_syscall 0x00
/* The SYS_signal_handler_return is executed here... its value is not always
* available in this context and so is assumed to be 7.
*/
#ifndef SYS_signal_handler_return
# define SYS_signal_handler_return (7)
#elif SYS_signal_handler_return != 7
# error "SYS_signal_handler_return was assumed to be 7"
#endif
/* Configuration ************************************************************/
/* SYS call 1 and 2 are defined for internal use by the RISC-V port (see
* arch/risc-v/include/rv64gc/syscall.h). In addition, SYS call 3 is the
* return from a SYS call in kernel mode. The first four syscall values must,
* therefore, be reserved (0 is not used).
*/
#ifdef CONFIG_BUILD_KERNEL
# ifndef CONFIG_SYS_RESERVED
# error "CONFIG_SYS_RESERVED must be defined to the value 4"
# elif CONFIG_SYS_RESERVED != 4
# error "CONFIG_SYS_RESERVED must have the value 4"
# endif
#endif
/* sys_call macros **********************************************************/
#ifndef __ASSEMBLY__
/* Context switching system calls *******************************************/
/* SYS call 0:
*
* int riscv_saveusercontext(uint64_t *saveregs);
*
* Return:
* 0: Normal Return
* 1: Context Switch Return
*/
#define SYS_save_context (0)
#define riscv_saveusercontext(saveregs) \
(int)sys_call1(SYS_save_context, (uintptr_t)saveregs)
/* SYS call 1:
*
* void riscv_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
*/
#define SYS_restore_context (1)
#define riscv_fullcontextrestore(restoreregs) \
sys_call1(SYS_restore_context, (uintptr_t)restoreregs)
/* SYS call 2:
*
* void riscv_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
*/
#define SYS_switch_context (2)
#define riscv_switchcontext(saveregs, restoreregs) \
sys_call2(SYS_switch_context, (uintptr_t)saveregs, (uintptr_t)restoreregs)
#ifdef CONFIG_BUILD_KERNEL
/* SYS call 3:
*
* void riscv_syscall_return(void);
*/
#define SYS_syscall_return (3)
#define riscv_syscall_return() sys_call0(SYS_syscall_return)
#endif
#endif /* __ASSEMBLY__ */
/****************************************************************************
* Public Types
****************************************************************************/
@ -51,6 +124,8 @@
* Inline functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
@ -59,7 +134,6 @@
* Public Function Prototypes
****************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
@ -68,10 +142,208 @@ extern "C"
#define EXTERN extern
#endif
/****************************************************************************
* Name: sys_call0
*
* Description:
* System call SYS_ argument and no additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call0(unsigned int nbr)
{
register long r0 asm("a0") = (long)(nbr);
asm volatile
(
"ecall"
:: "r"(r0)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call1
*
* Description:
* System call SYS_ argument and one additional parameter.
*
****************************************************************************/
static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call2
*
* Description:
* System call SYS_ argument and two additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call3
*
* Description:
* System call SYS_ argument and three additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call4
*
* Description:
* System call SYS_ argument and four additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call5
*
* Description:
* System call SYS_ argument and five additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
/****************************************************************************
* Name: sys_call6
*
* Description:
* System call SYS_ argument and six additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5,
uintptr_t parm6)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
register long r6 asm("a6") = (long)(parm6);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5), "r"(r6)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_RISCV_INCLUDE_SYSCALL_H */

2
arch/risc-v/src/bl602/Make.defs
View File

@ -23,7 +23,7 @@
HEAD_ASRC = bl602_vectors.S
# Specify our general Assembly files
CHIP_ASRCS = bl602_head.S riscv_syscall.S bl602_entry.S
CHIP_ASRCS = bl602_head.S bl602_entry.S
CMN_ASRCS += riscv_testset.S

2
arch/risc-v/src/esp32c3/Make.defs
View File

@ -25,7 +25,7 @@ include chip/Bootloader.mk
HEAD_ASRC = esp32c3_head.S
CHIP_ASRCS = esp32c3_vectors.S esp32c3_interrupt.S riscv_syscall.S
CHIP_ASRCS = esp32c3_vectors.S esp32c3_interrupt.S
# Specify C code within the common directory to be included

2
arch/risc-v/src/fe310/Make.defs
View File

@ -23,7 +23,7 @@
HEAD_ASRC = fe310_vectors.S
# Specify our general Assembly files
CHIP_ASRCS = fe310_head.S riscv_syscall.S
CHIP_ASRCS = fe310_head.S
CMN_ASRCS += riscv_testset.S

2
arch/risc-v/src/litex/Make.defs
View File

@ -23,7 +23,7 @@
HEAD_ASRC = litex_vectors.S
# Specify our general Assembly files
CHIP_ASRCS = litex_head.S riscv_syscall.S
CHIP_ASRCS = litex_head.S
CMN_ASRCS += riscv_testset.S

2
arch/risc-v/src/qemu-rv32/Make.defs
View File

@ -23,7 +23,7 @@
HEAD_ASRC = qemu_rv32_head.S
# Specify our general Assembly files
CHIP_ASRCS = qemu_rv32_vectors.S riscv_syscall.S
CHIP_ASRCS = qemu_rv32_vectors.S
CMN_ASRCS += riscv_testset.S

91
arch/risc-v/src/rv32im/riscv_syscall.S
View File

@ -1,91 +0,0 @@
/****************************************************************************
* arch/riscv/src/rv32im/riscv_syscall.S
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Public Symbols
****************************************************************************/
.file "up_syscall0.S"
.global sys_call0
.global sys_call1
.global sys_call2
.global sys_call3
.global sys_call4
.global sys_call5
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_syscall0, up_syscall1, up_syscall2, up_syscall3
*
* Description:
* up_syscall0 - System call SYS_ argument and no additional parameters.
* up_syscall1 - System call SYS_ argument and one additional parameter.
* up_syscall2 - System call SYS_ argument and two additional parameters.
* up_syscall3 - System call SYS_ argument and three additional parameters.
* up_syscall4 - System call SYS_ argument and four additional parameters.
* up_syscall5 - System call SYS_ argument and five additional parameters.
*
* Assumption:
* All interrupts are disabled except for the software interrupts.
*
****************************************************************************/
.text
sys_call0: /* a0 holds the syscall number */
sys_call1: /* a0 holds the syscall number, argument in a1 */
sys_call2: /* a0 holds the syscall number, arguments in a1 and a2 */
sys_call3: /* a0 holds the syscall number, arguments in a1, a2, and a3 */
sys_call4: /* a0 holds the syscall number, arguments in a1, a2, a3 and a4 */
sys_call5: /* a0 holds the syscall number, arguments in a1, a2, a3, a4 and a5 */
/* Issue the ECALL opcode to perform a SW interrupt to the OS */
ecall
/* The actual interrupt may not a occur for a few more cycles. Let's
* put a few nop's here in hope that the SW interrupt occurs during
* the sequence of nops.
*/
nop
nop
/* Then return with the result of the software interrupt in v0 */
ret
nop

2
arch/risc-v/src/rv32m1/Make.defs
View File

@ -23,7 +23,7 @@
HEAD_ASRC = rv32m1_vectors.S
# Specify our general Assembly files
CHIP_ASRCS = rv32m1_head.S riscv_syscall.S
CHIP_ASRCS = rv32m1_head.S
# Specify C code within the common directory to be included
CMN_CSRCS += riscv_initialize.c riscv_swint.c